Finishing and polishing machine



Sept. 15, 1931. J. M. NASH FINISHING AND POLISHING MACHINE Filed Jan.18, 1829 INVENTOR.

gm, MMW

A TTORNE Y.

Fatented Sept. 15, 1931 PATENT OFFICE JOHN M. NASH, OF MILWAUKEE,WISCONSIN FINISHING AND POLISHING MACHINE Application filed January 18,1929. Serial No. 333,268.

My invention relates to improvements in finishing and polishing machinesof the general type disclosed in my former Patent #480,398 and datedJune 17, 1890.

The object of this invention is to provide an attachment which willeffectually control or guide the work while it is being delivered fromsuch a machine, whereby curved pieces of work may be safely rotated incontact with sanding or polishing belts without danger of injury toworkmen or of damage to the work.

In sanding or polishing machines of the above mentioned type it iscustomary to revolve the work (tool handles, rods, bars,

and other pieces of material) in contact with traveling, abrading orpolishing surfaces such as sanding belts while progressively feeding thework through the machine by 3* means of suitable sets of feed rollersco-operative with the work rotating mechanism. here the work has acurved portion, the end which projects from the machine is caused toswing in a circle while the curved l? portion is being polished and theswinging end often develops momentum and centrifugal force which tendsto pull the work out of the machine, particularly after the rear end haspassed the infeeding rollers.

Unless the swinging movement of the free end of the work iscontrolled,it tends to swing in an unnecessarily large circle and itsmovement also tends to become irregular and when pulled away from themachine by the force thus developed, the work is sometimes thrownviolently to a distant point. My present object is to provide means,adjustable to the requirements of the work, for supporting and guidingthe projecting end thereof, thereby controlling its swinging movementand preventing it from being thrown out of a fixed path or line ofdelivery.

In the drawings:

Figure 1 is a conventional view, in elevation, showing a sanding machineof the type disclosed in my former patent with my improved attachmentapplied thereto, the latter being illustrated partially in vertical 5%section.

form generally to the parts J, M, G and associated parts shown in theaforesaid former patent. A steady rest or guide 14 is shown in Figure 1and in place of the fork Q shown in my former patent, I employ aconically recessed guide bracket 15 as alsoshown in Figure 1.

These parts and all other features of the sanding machine per se may beassumed to be of ordinary construction and further illustration anddescription of these parts is therefore deemed unnecessary.

The attachment claimed herein is carried by two supporting bars or rodswhich projectfrom theframe of the sanding machine or from the bracket15. Adjustably mounted on these rods is a. ring 21. The rods extendthrough suitable apertures in the sides of the ring whereby the lattermay be supported in any desired position of ad v justmentalong the rodsby set screws 22.

A pair of over arms 24 are supported by forked members 23 from pointsabove the ring 21 and in positions parallel with the axis of thesupporting rods 20. The over arms project outwardly from the ring on theside opposite that occupied by the sanding machine and a hanger 25 issuspended from these over arms and used to support a coneholding rod 26which carries a cone-holder 27 to which a wooden cone, 28 is secured.The lower end of the hanger 25 is apertured to receive the rod 26 andthe rod is secured in the desired position of adjustment in the hangerbearing or aperture by means of a set screw 29. The hanger is alsoadjustable along the over arms 24 and is similarly secured thereto byset screws 30.

The cone 28 is normally supported within secured. About the inner marginof this collar a covering 35 of canvas or similar material is wrappedand held in a position to form a cushion bearing for the work whenpassing through the ring, the diameter of the collar 34 being less thanthat of the ring, although it is greater than that of any, portion ofthe cone 2.8 intended to be inserted through, the collar.

Then work is being fed through the sanding machine, any portion of whichis curved, the ring 21 will be adjusted on the rods 20 in a position toreceive the end of the work between the cone and the ring, while thecurved portion of the work is being polished. The cone 28 Will alsobe-adjusted in the ring 21 to prouide; anannular opening forthe work ofa suitable width the requirements in this-r egar dibeing. determined bythe thick.- ness' of the work, the degree of its curvature, and thedistance of the ring and cone from the sanding machine. The latterdepends largely. upon the-length of the Work.

When properly adjusted, the cone guides the end of the work. into thespace between it and the ringcushion- 35 as the work developsitsswinging tendency andthe engaged portion-of the workis guidedinthecircular path provided by. this annulan space until the work.iscompletely, delivered; from the sanding machine. It then drops quietlyto the floor. The cushion or; covering 35 and the Woodenor nonemetallicsurfaces of the cone prevent, abrasion-of the work, the latter contactingwiththe metalbaeking 27 but lightly and for a very br-iefperiodifat all.

lV-hile my attachment may be-used-at both the.infeedingandoutfeedingsides of the polishing machine, itwillusuallybesufficienttense-it only atgthe outfeedingside, it being,customary tofeedthe morestraight end of the workthroughthe machine inadvance. of the curved end.

I claim;

1. A- ork; guidingattachment for work, rotating; and; feeding machines,comprising the combination ofan annulus, a cone disposed; with; its apexprojecting through the annulus and adoptedto receive a portion oftheworlnbetween it and said annulus, duringgpolishin g operations,onanother portion ofzthe work.

2: A; work guidingattachment, for finishingiand ,polishingmachines of awork receivinghannulus adj ustably spaced from'the ma chine, and; a conesupported with its axis intersecting the plane of the annulus at thecenter thereof and adjustable axially with reference. to, the annulus3r. Aworleguidingattachment for finishing and polishing-machines of-awork receiving annulus adjustably spaced fromthe machine, and a conesupported with its axis intersecting the plane of the. annulus at thecenterthereof: andadjustable axially with reference to the annulus, saidannulus and cone having non-abrasive bearing surfaces for the Work.

4;. A Work guiding attachment for Work rotating and feeding machines,comprising and awork guide adj ustably supported fromthe over arms atthe center of the annulus.

6. In. a work. guiding device for rotating work havingcurvedfportionsthe combination of; a ring supportedin the path of the work,

a. collar secured? to the ring and cushionedalong. its inner margimacone holder supported-on the outfeeding side ofthe ring, andanon-abradlng. cone carried thereby withits axis extending through thecenterE of. the ring;

and collar said cone being spaced from the collar; and ring; to allowthe work to sw-ing inacircular path between them.

7. v An, attachment for a finishing. and polishing machine, having meansfor rotating the WOT-k, said attachment comprisinga guide for engagingthe dischargingendportion of a; crooked piece of work,saidguidehav-ingwork engagingmembers and adjusting means for; adaptingit to hold the engaged portion of the work to its natural annular pathabout the. normal axial line of discharge until the work is Whollyreleased from-said machine.

JOHN M. NASH;

